Some of Dewavrin’s closest colleagues – Captain Fourcard and Lieutenant Duclos – were Cagoulards (a right-wing group), but Dewavrin always denied that he was. He insisted that he had supported the Republic during the Spanish Civil War and had opposed the Munich Agreement.[1]

Dewavrin collated information from the French Resistance and planned operations for 350 agents who were parachuted to France to work with them. He secretly traveled to France on occasion to meet with the Resistance and coordinate intelligence gathering and sabotage. On 23 February 1943 Dewavrin parachuted to France alongside Pierre Brossolette to meet with Jean Moulin.

After the war, Dewavrin was head of intelligence for de Gaulle's provisional government until de Gaulle resigned in January 1946. His successor accused Dewavrin of embezzling Free French money for his own purposes. Dewavrin was jailed for four months in Vincennes. He was eventually acquitted for lack of evidence. British historian Antony Beevor suspects that Dewavrin might have tried to collect money to work against a possible communist takeover attempt.

Dewavrin published three volumes of memoirs in 1947, 1949, and 1951, and eventually retired from the army to become a businessman.

According to The Secret War by Max Hastings, a Soviet spy made a claim in a report to Moscow that Andre' Dewavrin was recruited by Canaris to work for the Germans. Hasting stated this report was false, but supplied no reference to support the statement.